Electrocardiogram recorder



FIG. 1 is a front perspective view of an electrocardiogram recorder in accordance with our new and ornamental design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof, wherein the broken lines form no part of the claimed design; and,

FIG. 8 is a reference view showing the electrocardiogram recorder connected to a charger, and the charger and broken lines depicting it present environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for an electrocardiogram recorder, as shown and described. 